Internal-combustion engine.



G. L. M. DRWALD. NTBRNAL GGMBUSTION ENGINE.

APPLICATION FILED JUNE7,1912.

Patented June 30, 191'4.

whom/M30 .9... Mu... V.1. 1,25,...

GOTTFRED LUDVIG lVX DRWALD, OF LONDON, ENGLANDC.

NTERNAL-COMBUSTIN ENGINE. A

Specification of Letters Patent.

Application filed J une 7, 1912.

lPatented lune 30?, 19M Serial No. 702,354.

To all '1o/z om t may concern Be it known that l, -Go'rrrmnn EUDWIG MAX DRWALD, a subject of t-he German Eniperor, residing at 226 Merton road, Wands- Worth, London, England, have invented certain new and useful Improvements in `nternal-Combustion Engines; and do hereby declare the following to be a full, clear, and exact description ot the invent-ion, such as will enable others skilled in the art to which it appertains to make and usethe same.

The presentinvention relates to fuel feeding apparatus for internal combustion engines, and consists in the arrangements and combinations of parts hereinafter disclosedv and particularly set forth in the accompanying claims.

The invention has for its purpose to pro-` vide a construction of internal combustion engine wherein the engine piston carries the charge forming and feeding mechanism, a nd which in the Working of the piston operates to draw the fuel from the source oi supply and compress and commingle lthe same with air, and then inject the mixture into the tiring chamber.

71th these and other objects in view the invent-ion consists in the novel details ot construction and combinations of parts more fully hereinafter disclosed and particularly pointed out in the claims.

The invention is shown by Way of illustration in the accompanying drawing wherein the ligure is a central vertical section, and

part elevational View, of an engine cylinder and piston equipped with the mechanism.

Referring to the construction in further detail, l designates .the engine cylinder having the usual casing 2 providing a `cater jacket i3; and t and 5 designate, respectively, the inlet and exhaust passages A. piston C is connected by the gudgeon 7 to the piston rod 8. cylinder 9 mounted within the piston (3 and is disposed transve ily thereof, and a double piston l0 and ll is mounted.

to operate within said cylinder il, and derives its motion through the medium of the piston rod extension l2 which passes through the slot lf'l of the cylinder 9 and engages with the double piston at the point le. The. cylinder and piston construction (Qt l0 and 11) have for their purpose to compress airjvvithin the respective cylinder chambers l5 and 16, and force said air under compression into the tiring chamber X through the passageways 17 and 18 through the tubes 19 and 20 connecting the cylinder 9 with the head of the piston 6. Air is admitted .into the cylinder chambers 15 and 16 through the ports 21 and 22 formed in the cylinder 9.

A controlling valve 23 is .provided for each of the tubes 19 and 20, and is adapted to normally close on the valve seat 25 through the agency of the spring 26 surrounding the valve stem or'rod 27. The rod or valve stem 27 is constructed with a' hooked end 28 that engages with a linger 29 on the member 30, which is pivotally mounted on the pin 3L A second linger 32 is carried by the member 30 and projects into the path of movement of the piston operating'in the cylinder 9, and when engaged by said piston the mechanism aforesaid operates to withdraw or nnseatthe valve 23 and permit the air compressed in the chamber l5 to escape into the firing chamber X.

A pair of cylinders and 34C are mounted on the piston 6 immediately beneath the cylinder 9, and pistons 35 and 36 are mounted to work in said cylinders 33 and 34 through the agency of the piston rod 8Y` t0 which they are connected by the pin 37. The cylinders and pistons 34, 35 and 36 have for their purpose to charge the engine cylinder with'fuel under pressure. A chamber 38 is formed in the wall of the piston 6 adjacent each of the cylinders 33 and 34, and communicates with the chamber of each of said c. linders tlirouli the assaeewa 39 C* p :D

as clearly shown to the left in the accompanying drawing. A of tubes ft() is carried by the piston (Land communicate, respectively, withthe lchambers 38, and a spring seated valve il normally closes the cnmnnlnicating passageway between each tube and chamber. as shown. A pipe or lube l2 extends iron), each ot the fuel compre ng chambers 33 and 3-l to each of the air discharging tubes'l and 20, and comnnlni-cales therewith at the space or chamber provided lor the wcrlfingof the valve EL pair of fuel supply tamis 42S is mounted lil on the engine cylinder adjacent the crank shaft casing, and the fuel contained therein is adapted to be maintained under constant in-essuie from any suitable source. ,Tin outlet tube all is provided for each tanlr L23 and has its passageway normally closed by a needle valve 'l5 through the agency of a springl 4G acting against the rod el? that carries the needle valve ll-. rlhe valve stem Lt7 is adapted to be engaged by the rim of the piston 6 on each stroke of the piston to unseat the valve a5, to permit the fuel under pressure to pass through the registering tubes filland l0 and enter the chamber 38. llt points near the ends of the suction strokes of the pistons 35 and 3G in the cylinders and Sel, the valve rods 47 are moved to unseat their respective'valves7 and irnrned'iately following the tubes la are brought into register with the pipes l-O. T he fuel under pressure in the tanks 3d is then admitted into the chambers 38 to be forced through the tubes 4t2 on the return strokes of the pistons 35 and 3G.

.lssniningL the parts to be in the positions showin the operation is as follows: The piston lO, in movingr to the right, will take in a (,:harge of air through the port 2l, and the chamber 38 and piston chamber 3d- (on the right) will vbe charged with fuel from the tant: fifi, duc to the suction created by the piston 3G. Un the reviirse movement of the pistons il) and 3G the charge of air vill be compressed and forced through the tube 197 and the fuel charge through the 'tube 42, and said fuel and air charges will be comming-led or mixed Within the tube lh-and in this state enter the cylinder chamber X. ready for ignition. The reversing of the engine is brought about by closingr oil:1 the fuel supply of the tank 43, according to which one is at the time in use, and opening the other.

l't is obvious that those skilled in the art may yary the details of construction and arrangement of parts without departil'ig from the spirit of. my invention, and therefore l do not irish to be limited to such features except as may be required by the claims.

l clairnl. in. an internal eonilnistion engine 'the combination of a cylinder; a piston operable in said cylinder; a .piston rod connected to the piston; an. air compression cylinder earricd by th` pisloi a piston operable in said air compr .iion cylinder and connected to s id pistou rod; means for be aetuatrxl ny roniluWi-oj tl esseri air from the an' conipi the explosirm cyl in(v o." fulinitl le' fuel to' coinnuiurle wie..y llc compri air de lli/cred into the eoinbn, ion cylimler,

2. l: :in iutia'nal combustion engine the inname v eon'ibination of a cylinder; a piston operable in said cylinder; piston rod connected to the piston; air con'ipressing means carried by said piston and connected to be operated by said piston rod; means for conducting the compressed air from said compressing means into the explosion cylinder; a cylinder carried by the engine piston; means for feeding fuel into said. cylinder; a piston operable in said cylinder for compressing vsaid fuel and connected to be operated by the piston-rod; and means for conducting the fuel to coi'mningle With the compressed ai' delivered into the combustion cylinder.

3. iin an internal con'ibustion engine the combination of a cylinder; a piston operable in said cylinder; a piston rod connectedto the piston; an air compression cylinder carried by the piston; a piston operable `in said air compression cylinder and connected to be actuated by said piston rod; a pipe for conducting the compressed. air from the air compression cylinder into the explosion cylinder; a second cylinder ca'rried by the engine piston; a piston operable in said second cylinder and connected to the piston rod; means for feeding fuel into said second cylinder; and a pipe extending from said fuel cylinder to the air delivery pipe of the air compression cylinder.

4e. ln an internal combustion engine the combination of :i cylinder; a piston operable in said cylinder; a piston rod connected to the piston; an air compression cylinder carried by the piston; a piston operable in said air compression cylinder and connected to be actuated by said piston rod; a pipe forv conducting the compressed air from the air compression cylinder into the explosion cyl* in der; a spring seated Valve normally closing the air conducting pipe; an actuating device connected to said controlling valve and adapted to be operated by the air compression piston to admit the air into the explosion cylinder; a second cylinder carried by the engine piston and adapted to be. charged with fuel; :i piston operable in said fuel cylinder and connected to be operated by the piston rod; and a pipeconnecting the fuel cylinder with the discharge pipe of the air com pression cylinder.

in an internal combustion engine the combination of a cylinder; a piston operable in said cylinder; a piston rod connected to the pistou; ay cylinder carried by the pislou and providing opposed air compressing chambers; a double piston operable in said second cylinder to compress air 'in said chambers; pipes for conducting the coini'iressed air 'from said chambers into the eX- plosion cylinder; valve mechanism controlling;l passageways through said pipes and adapted to be actuated by the double piston;

a pair of cylinders Carried by the engine In testimony whereof, Ilellx my signaplston; menus for adnnttuig fuel into Said tu1'e,1n presence of two Witnesses. pair of cylinders; :1 double piston operable in Said fuel cylinders and connected toA be GOTTFRIED LUDWIG MAXDORWLD operated by the piston rod; and pipes :0n- VVitneSses:

meeting tlm respectivo fuel Compression cyl- WILLIAM CROSSLEY,

index-s will: the discharge pipes of the air R. VESTACOTT.

Compression cylinder. 

